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Accounts Receivable - Textual (Details)	Dec. 31, 2017	Dec. 31, 2016
Receivables [Abstract]
Allowance for doubtful accounts as a percentage of total patient due accounts receivable balance (percent)	16.10%	15.60%

X

- Definition

Allowance for doubtful accounts expressed as a percentage of gross patient accounts receivable.

+ References

No definition available.

+ Details

Name:	ehc_AllowanceForDoubtfulAccountsAsPercentageOfPatientAccountsReceivable
Namespace Prefix:	ehc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

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- References

No definition available.

+ Details

Name:	us-gaap_ReceivablesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration